Hi Freddy,
first things that come to mind are make sure both you and Maria know how to deal with downhills (we've had experienced skaters from "flat" places who had trouble with our steep streets), and bring water. I don't know what your ride in Copenhagen is like, but here we're off for three hours, and only very rarely are there occasions to get water on the way.
(A tip:
these fountains, and any other green painted fountain are drinking water, even if it is not specified anywhere.)
Have fun, and why don't you come over to the staff to say hi? (I'm sorry I won#t be there myself as I'm currently on maternity leave, but our staffers are all nice people.

)
Safe skating, and come back here afterwards to tell us how you liked it!
Mayken